Zukko Blog
Guides to Claude Code, Cursor, Codex and the Claude and GPT APIs: setup, token savings and troubleshooting.
ChatGPT API price: what GPT models cost and how to price a request
6 min · · экономия
We price requests to GPT models at October 18, 2026 rates: the formula, the role of cache, three scenarios and a comparison with official tariffs.
AI for Arduino: how to write sketches with a model and not fry the board
5 min · · development
A model can draft a sketch but cannot see your wiring. How to describe the board, check code before uploading and debug using Serial output.
GLM API price: what GLM 5.3 and 5.3 Flash cost on real tasks
6 min · · экономия
We price GLM 5.3 and GLM 5.3 Flash on three scenarios and explain why a single input and output price helps with long answers.
GPT-6 Astra or GPT-6 Sol: price and index differences, and what to pick
5 min · · сравнение
Astra and Sol from the GPT-6 family differ in price and Intelligence Index. We price the same task on both and give a simple selection rule.
ChatGPT does not work in Russia: what the errors mean and what to do
5 min · · errors
Access errors for ChatGPT and the OpenAI API explained, with their causes and a way to use GPT models through a gateway in chat and via the API.
Claude API: what it is and how it differs from the claude.ai chat
5 min · · API keys
The Claude API gives your code access to the models and is billed per token. The Messages API, caching and tools explained, with a first request.
AI agent: what it is, how it is built and how it differs from a chatbot
5 min · · агенты
An agent is a model that picks its own actions and repeats a loop until the task is done. The structure, examples and honest limits.
Qwen Code or Claude Code: which terminal agent to pick
5 min · · сравнение
Two terminal agents with a similar feature set. We compare setup, models and API cost so the choice is not a blind one.
AI for 1C: how to write code in the built-in language with a model
5 min · · development
A model cannot see your configuration and may invent methods and attributes. Here is how to give them metadata and examples, verify the code and estimate request costs.
Claude Opus in Russia: how to use Opus 5.5 in chat and via API
5 min · · models
Three working ways to use Claude Opus 5.5 from Russia: web chat, an API request and Claude Code. With code and a cost estimate at October 18, 2026 prices.
Neural network hallucinations: why a model makes things up and how to reduce it
5 min · · development
Made-up facts cannot be removed completely, but they can be made rare and visible. The causes and five measures with working Python code.
Prompt engineering for LLMs: the basics that work with any model
5 min · · development
A good prompt is not a spell but six concrete parts. We show them on one example where both the answer and the request price change.
OpenAI API key for free: what is true and what is a trap
5 min · · API keys
A permanently free key does not exist: the API is paid per token. Why keys found online are dangerous, and how many requests a one-dollar balance buys.
Translating Russian to English with a neural network: how to get natural English
5 min · · автоматизация
Good English depends on parameters people often forget to set: audience, register, language variant. A prompt, back-translation checks and the price of a batch.
Aider or opencode: which terminal agent to choose
6 min · · сравнение
Both live in the terminal and connect to third-party models, but they are built differently: aider drives git for you, opencode is closer to an agent workbench.
GitHub Copilot: what it is and how it differs from AI agents
6 min · · IDE
What GitHub Copilot is, what it consists of and how it differs from Cline, Cursor and Claude Code, and when you need your own key.
Translating English to Russian with a neural network: model, prompt and checks
4 min · · автоматизация
Natural Russian comes from an instruction, a glossary and automated checks, not from picking a single "best" model. A scheme with code and a price comparison.
GitHub Copilot in Russia: what works and what to use instead
6 min · · IDE
What makes GitHub Copilot a question mark for users in Russia, and which alternatives work in VS Code on your own API key.
A neural network for programming online: a browser chat with no install
5 min · · development
You do not need an editor to get started: a browser and a key are enough. Working prompts, model choice and the price of a typical conversation.
Anthropic API key for free: what really exists and what it costs
5 min · · API keys
There is no permanent free Anthropic key, and trial terms change. How a key is created, where the catch is, and what a Claude test costs.
Ollama: what it is, what it's for and how it differs from a cloud API
6 min · · models
Ollama runs open language models on your computer and serves them over a local API. What it can and can't do, and when a cloud API is the better fit.
OpenAI API: what it is, which endpoints exist and why the format became a standard
4 min · · API keys
An API lets your code call a model instead of a person typing in a chat. A look at requests, responses and why the OpenAI format is used far beyond the company itself.
The context window in neural networks: what it is and why size is not everything
5 min · · models
The context window is a model's entire working memory for one request: prompt, history, files and the answer. How to count it and what a long context costs.
Building a website with AI: what it really costs and how to do it
5 min · · development
A step-by-step business-card site built with the Claude Code agent, with a cost estimate, and an honest note on where "free" ends.